MULTI-PROCESS WELDERS
®
Invertec V350-PRO
Output
CC
CV
Designed Smart. Built Tough.
The Invertec® V350-PRO is a versatile, multi-purpose, multi-process
power source that’s lightweight and portable. Available in Construction,
Factory, Factory (Tweco®), and Advanced Process models, the
V350-PRO is capable of doing virtually any job, whether in the shop or
on the construction site. The V350-PRO is capable of stick, DC TIG,
MIG, Pulsed MIG(1), flux-cored and arc gouging, making it the
most versatile inverter power source in its class. And it’s built
tough to handle the rigors of harsh environments.
DC
Input
1
PHASE
3
50
60
Hz
Processes
Stick, DC TIG, MIG, Pulsed(1), Flux-Cored, Gouging
Note: Plugs not included with Tweco® model.
Advantage Lincoln
• Choose the Construction Model for economy and lightweight porta-
bility, the Factory Model for full remote capabilities, and the Advanced
Process Model for pulsed MIG applications.
• The K1728-5, -6, -7, -8, Invertec® V350-PRO includes Twist-Mate™
Cable Plugs (K852-70, quantity 2) for easy, tool-less cable connection.
The K1728-13 Invertec® V350-PRO Factory (Tweco®) model includes
Tweco® cable receptacles. Tweco® plugs are not included.
• All input voltages and frequencies are both single and three phase
rated—no output derating necessary on single phase.
• Bright, large digital amp and volt meters are easy to monitor—even in
sunlight—and presettable for precise procedure control.
• 5-425 amp output range for all recommended processes from DC TIG
to arc gouging.
• Rugged skid and tube handles for convenience and added protection.
• Input voltage from 208-575 and 50 and 60 Hz operation—this one
machine is capable of running on virtually any input power supply.
• Manufactured under a quality system certified to ISO 9001
requirements and ISO 14001 environmental standards.
• Touch-StartTIG® for contamination-free starts.
• Three-year warranty on parts and labor. Two-year extended warranty
available in the U.S.
• Low power consumption for energy savings—88% efficiency.
• Advanced Process model includes Pulsed MIG, Pulse-On-Pulse®
(1)
and Power Mode® for best-in-class welding performance.
Advanced Process Panel only.
• Parallel two units for 700A carbon arc gouging.
TECHNICAL SPECIFICATIONS
Rated Output
Current/
Voltage/Duty Cycle
Dimensions
H x W x D
inches (mm)
Net
Weight
lbs.(kg)
Product
Name
Product
Number
Input Current @
Rated Output
Output
Range
Model
Input Power
200-208/230/380-415/
460/575/1/3/50/60
208/230/415/
460/575/1/3/50/60
K1728-5
K1728-6
Construction
Factory
350A/34V/60%
300A/32V/100%
3ph: 50/42/28-26/23/18
1ph: 94/85/54/42/37
3ph: 41-39/36/23-22/19/16
1ph: 76/69/41/36/31
5-425A
14.8 x 13.3 x 27.8
81
Max OCV: (376 x 338 x 709)
80V DC
(36.7)
Invertec®
K1728-7 Advanced Process
V350-PRO K1728-13
Factory (Tweco®)
CE
K1728-8
200-220/380-400/
415-440/1/3/50/60
350A/34V/60% (3ph)
320A/33V/60% (1ph)
300A/32V/100% (3ph)
275A/31V/100% (1ph)
3ph: 48/28-27/26-24
1ph: not rec’d - 82/55-50/48-45
3ph: 41-37/28-22/22-21
86.5
(37.4)
-
1ph: not rec’d 64/44-43/38-35
Tweco® is a registered trademark of Thermadyne.
Publication E5.91 11/07
A CLOSER LOOK
FEATURES
M
Key Controls
A ) Large, bright, easy to read meters
B ) Local/remote output control
C) Mode selection switch
D) Remote Output Control Receptacles—6- & 14-pin
E ) Negative and Positive Twist-Mate® or Tweco®
Output Teminals
F ) Wire Feeder Voltmeter Polarity Switch
G) Circuit Breaker Reset Buttons
H) On/Off Switch
I ) Hot Start Control
J ) Arc Control Knob
K ) Weld Terminals on or remotely controlled
L ) Preset Output Amps and Voltage Control
M) Thermal Overload Indicator Light
A
L
B
C
K
J
I
D
E
H
Shown:
G
F
Invertec® V350-PRO
Factory Model
®
Pulse-On-Pulse
• Uses a sequence of varying pulse wave shapes to produce a TIG-like bead appearance and
excellent weld properties when MIG welding aluminum.
• Pulse-On-Pulse® controls arc length and heat input together, making it easier to achieve good
penetration.
For more information see Nextweld® Document NX-2.10
Pulse-On-Pulse® on 3mm Aluminum
®
Power Mode
• Uses high-speed regulation of output power to deliver extremely fast response to changes in the
arc, for example, when using a whip technique.
• Improved MIG welding performance, including low spatter, very uniform, consistent bead wetting
and controlled penetration.
• Great for low voltage applications on thin steel and stainless steel material less than 20 gauge
(0.7 mm).
• Delivers excellent arc characteristics on aluminum and other alloys such as silicon bronze and
nickel alloys.
Power Mode® aids
bead wetting
and penetration
on aluminum.
Power Mode® reduces
spatter and improves
bead appearance,
even for low voltage
procedures on
stainless.
PULSE FREQUENCY
Peak
For more information see Nextweld® Document NX-2.60
Ramp Up
Tail Out
Pulsed MIG
• Varies weld current between peak (high heat) and background (low heat) current to provide
better control of heat input.
Background
Step Off
• Reduces warping and burnthrough on thin materials.
TIME
• Enables in-the-flat, horizontal, vertical up, or overhead welding without a slag system. Great for
hard automation, robotic, and high production semiautomatic applications.
• Optimized GMAW-P waveforms are available to use on aluminum, carbon steel, high strength
low alloy steel, stainless steel, and nickel alloys.
Low Heat
(Background)
High Heat
(Peak)
For more information see Nextweld® Document NX-2.70
Invertec® V350-PRO
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